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How has IBM impacted Computer Storage today and moving forward? IBM invented the hard disk drive (HDD) and brought it to market in 1956, the HDD which were considered secondary storage devices at that time. As technology advanced HDD were the primary data storage devices in the ’60’s. The first IBM drive, the 350 RAMAC , was approximately the size of two refrigerators and stored 5 million 6-bit characters (the equivalent of 3.75... [Continue Reading]